Revision: 18087
Author: [email protected]
Date: Tue Nov 26 17:52:31 2013 UTC
Log: ExperimentalScanner += SeekForward.
[email protected]
BUG=
Review URL: https://codereview.chromium.org/88823004
http://code.google.com/p/v8/source/detail?r=18087
Modified:
/branches/experimental/parser/src/lexer/experimental-scanner.h
=======================================
--- /branches/experimental/parser/src/lexer/experimental-scanner.h Tue Nov
26 15:58:36 2013 UTC
+++ /branches/experimental/parser/src/lexer/experimental-scanner.h Tue Nov
26 17:52:31 2013 UTC
@@ -181,7 +181,12 @@
}
void clear_octal_position() { } // FIXME
- void SeekForward(int pos) { } // FIXME
+ // Seek forward to the given position. This operation works for simple
cases
+ // such as seeking forward until simple delimiter tokens, which is what
it is
+ // used for. After this call, we will have the token at the given
position as
+ // the "next" token. The "current" token will be invalid. FIXME: for
utf-8,
+ // we need to decide if pos is counted in characters or in bytes.
+ virtual void SeekForward(int pos) = 0;
// Scans the input as a regular expression pattern, previous
// character(s) must be /(=). Returns true if a pattern is scanned.
@@ -240,6 +245,7 @@
virtual ~ExperimentalScanner() { }
virtual void Scan();
+ virtual void SeekForward(int pos);
virtual bool ScanRegExpPattern(bool seen_equal);
virtual bool ScanRegExpFlags();
@@ -281,6 +287,15 @@
const Char* cursor_;
const Char* marker_;
};
+
+
+template<typename Char>
+void ExperimentalScanner<Char>::SeekForward(int pos) {
+ cursor_ = buffer_ + pos;
+ start_ = cursor_;
+ marker_ = cursor_;
+ Scan(); // Fills in next_.
+}
template<typename Char>
--
--
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